Will be having a go at AG at the weekend but am already planning next brew , were to get flaked corn

[Cwrw666]

Why sanitise your FV at this point? The sparge water/wort will go into the boil, where it will be sanitised anyway. And by dunking your mash bag into the FV, you're going to be introducing all manner of things, so you'll just have to sanitise your FV again.

Well I don't re sanitise the FV - the biab bag is at pasteurizing temperature and the sparge water is too. Been doing this for 7 years now without problems, about 25 brews per year. Plus I transfer from the boiler at about 90c for no chill in the FV. So that's pretty much resanitised it anyway